The division of the nucleus known as

It is believed that europa, one of jupiter’s moons has an ocean beneath its surface. based on how earth’s oceans and atmosphere are believed to have formed, what can be said about europa’s supposed ocean? the arrival of in the early days of europa’s existence could have formed its ocean. it is likely that the water experienced , similar to earth. it is also possible that this water is retained beneath europa’s surface and in its atmosphere due to europa’s .

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

Some substances but not other can cross the (blank) membrane of a cell